If you buy it, don't get too into it yet, HotS will be coming out soon, and chances are strategies and crap will change a ton.

HotS is most likely not going to arrive until next year, there is no reason why someone can't get into it at this point. Yes, a lot of strategies will change with the new game units, but the key mechanics and basic strategies will remain the same.

HotS is most likely not going to arrive until next year, there is no reason why someone can't get into it at this point. Yes, a lot of strategies will change with the new game units, but the key mechanics and basic strategies will remain the same.

At the current time it's almost impossible to predict when HotS will come out, because of the lack of info on Blizzards' part, but it's most definitely going to be late this year or some time next year.

Edited:

Honestly, it's almost impossible to predict anything accurately about HotS multiplayer, because all we know about it are the new units.